English verb conjugation
MAY GRUMBLE

Regular verb: grumble - grumbled - grumbled

Affirmation

Simple form	V-ing form
I may grumble you may grumble he may grumble we may grumble you may grumble they may grumble	I may be grumbling you may be grumbling he may be grumbling we may be grumbling you may be grumbling they may be grumbling
Perfect	V-ing perfect
I may have grumbled you may have grumbled he may have grumbled we may have grumbled you may have grumbled they may have grumbled	I may have been grumbling you may have been grumbling he may have been grumbling we may have been grumbling you may have been grumbling they may have been grumbling

Negation

Simple form	V-ing form
I mayn't grumble you mayn't grumble he mayn't grumble we mayn't grumble you mayn't grumble they mayn't grumble	I mayn't be grumbling you mayn't be grumbling he mayn't be grumbling we mayn't be grumbling you mayn't be grumbling they mayn't be grumbling
Perfect	V-ing perfect
I mayn't have grumbled you mayn't have grumbled he mayn't have grumbled we mayn't have grumbled you mayn't have grumbled they mayn't have grumbled	I mayn't have been grumbling you mayn't have been grumbling he mayn't have been grumbling we mayn't have been grumbling you mayn't have been grumbling they mayn't have been grumbling

Interrogative form

Simple form	V-ing form
may I grumble? may you grumble? may he grumble? may we grumble? may you grumble? may they grumble?	may I be grumbling? may you be grumbling? may he be grumbling? may we be grumbling? may you be grumbling? may they be grumbling?
Perfect	V-ing perfect
may I have grumbled? may you have grumbled? may he have grumbled? may we have grumbled? may you have grumbled? may they have grumbled?	may I have been grumbling? may you have been grumbling? may he have been grumbling? may we have been grumbling? may you have been grumbling? may they have been grumbling?

Interro-negative form

Simple form	V-ing form
mayn't I grumble? mayn't you grumble? mayn't he grumble? mayn't we grumble? mayn't you grumble? mayn't they grumble?	mayn't I be grumbling? mayn't you be grumbling? mayn't he be grumbling? mayn't we be grumbling? mayn't you be grumbling? mayn't they be grumbling?
Perfect	V-ing perfect
mayn't I have grumbled? mayn't you have grumbled? mayn't he have grumbled? mayn't we have grumbled? mayn't you have grumbled? mayn't they have grumbled?	mayn't I have been grumbling? mayn't you have been grumbling? mayn't he have been grumbling? mayn't we have been grumbling? mayn't you have been grumbling? mayn't they have been grumbling?